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                    快速上手
            
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                    基础类型
            
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                    接口
            
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                    类
            
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                    函数
            
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                    泛型
            
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                    枚举
            
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                    类型推论
            
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                    类型兼容性
            
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                    高级类型
            
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                    实用工具类型
            
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                    Symbols
            
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                    Iterators 和 Generators
            
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                    模块
            
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                    命名空间
            
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                    命名空间和模块
            
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                    模块解析
            
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                    声明合并
            
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                    书写.d.ts文件
            
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                    JSX
            
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                    Decorators
            
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                    混入
            
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                    三斜线指令
            
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                    JavaScript文件里的类型检查
            
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                    如何书写声明文件
            
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                    结构
            
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                    规范
            
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                    举例
            
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                    深入
            
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                    发布
            
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                    使用
            
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                    工程配置
            
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                    tsconfig.json
            
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                    工程引用
            
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                    NPM包的类型
            
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                    编译选项
            
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                    配置 Watch
            
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                    在MSBuild里使用编译选项
            
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                    与其它构建工具整合
            
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                    使用TypeScript的每日构建版本
            
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                    Wiki
            
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                    TypeScript里的this
            
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                    编码规范
            
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        <li class="chapter " data-level="1.6.3" data-path="../wiki/Common Errors.html">
            
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                    常见编译错误
            
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        <li class="chapter " data-level="1.6.4" data-path="../wiki/TypeScript-Editor-Support.html">
            
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                    支持TypeScript的编辑器
            
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        <li class="chapter " data-level="1.6.5" data-path="../wiki/Using-TypeScript-With-ASP.NET-5.html">
            
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                    结合ASP.NET v5使用TypeScript
            
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        <li class="chapter " data-level="1.6.6" data-path="../wiki/Architectural-Overview.html">
            
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                    架构概述
            
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        <li class="chapter " data-level="1.6.7" data-path="../wiki/Roadmap.html">
            
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                    发展路线图
            
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            </ul>
            
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        <li class="chapter " data-level="1.7" data-path="./">
            
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                    新增功能
            
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        <li class="chapter " data-level="1.7.1" data-path="TypeScript 3.1.html">
            
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                    TypeScript 3.1
            
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        <li class="chapter " data-level="1.7.2" data-path="TypeScript 3.0.html">
            
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                    TypeScript 3.0
            
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                    TypeScript 2.9
            
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                    TypeScript 2.8
            
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                    TypeScript 2.7
            
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                    TypeScript 2.6
            
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                    TypeScript 2.5
            
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                    TypeScript 2.4
            
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                    TypeScript 2.3
            
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        <li class="chapter " data-level="1.7.10" data-path="TypeScript 2.2.html">
            
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                    TypeScript 2.2
            
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                    TypeScript 2.1
            
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                    TypeScript 2.0
            
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                    TypeScript 1.8
            
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        <li class="chapter " data-level="1.7.14" data-path="TypeScript 1.7.html">
            
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                    TypeScript 1.7
            
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                    TypeScript 1.6
            
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                    TypeScript 1.5
            
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                    TypeScript 1.4
            
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                    TypeScript 1.3
            
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        <li class="chapter " data-level="1.7.19" data-path="TypeScript 1.1.html">
            
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                    TypeScript 1.1
            
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        <li class="chapter " data-level="1.8" data-path="../breaking-changes/breaking-changes.html">
            
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                    Breaking Changes
            
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        <li class="chapter " data-level="1.8.1" data-path="../breaking-changes/TypeScript 2.4.html">
            
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                    TypeScript 2.4
            
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                    TypeScript 2.3
            
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                    TypeScript 2.2
            
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        <li class="chapter " data-level="1.8.4" data-path="../breaking-changes/TypeScript 2.1.html">
            
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                    TypeScript 2.1
            
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        <li class="chapter " data-level="1.8.5" data-path="../breaking-changes/TypeScript 2.0.html">
            
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                    TypeScript 2.0
            
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        <li class="chapter " data-level="1.8.6" data-path="../breaking-changes/TypeScript 1.8.html">
            
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                    TypeScript 1.8
            
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        <li class="chapter " data-level="1.8.7" data-path="../breaking-changes/TypeScript 1.7.html">
            
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                    TypeScript 1.7
            
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        <li class="chapter " data-level="1.8.8" data-path="../breaking-changes/TypeScript 1.6.html">
            
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                    TypeScript 1.6
            
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                                <h1 id="typescript-25">TypeScript 2.5</h1>
<h2 id="&#x53EF;&#x9009;&#x7684;catch&#x8BED;&#x53E5;&#x53D8;&#x91CF;">&#x53EF;&#x9009;&#x7684;<code>catch</code>&#x8BED;&#x53E5;&#x53D8;&#x91CF;</h2>
<p>&#x5F97;&#x76CA;&#x4E8E;<a href="https://github.com/tinganho" target="_blank">@tinganho</a>&#x6240;&#x505A;&#x7684;&#x5DE5;&#x4F5C;&#xFF0C;TypeScript 2.5&#x5B9E;&#x73B0;&#x4E86;&#x4E00;&#x4E2A;&#x65B0;&#x7684;ECMAScript&#x7279;&#x6027;&#xFF0C;&#x5141;&#x8BB8;&#x7528;&#x6237;&#x7701;&#x7565;<code>catch</code>&#x8BED;&#x53E5;&#x4E2D;&#x7684;&#x53D8;&#x91CF;&#x3002;
&#x4F8B;&#x5982;&#xFF0C;&#x5F53;&#x4F7F;&#x7528;<code>JSON.parse</code>&#x65F6;&#xFF0C;&#x4F60;&#x53EF;&#x80FD;&#x9700;&#x8981;&#x5C06;&#x5BF9;&#x5E94;&#x7684;&#x51FD;&#x6570;&#x8C03;&#x7528;&#x653E;&#x5728;<code>try</code> / <code>catch</code>&#x4E2D;&#xFF0C;&#x4F46;&#x662F;&#x6700;&#x540E;&#x53EF;&#x80FD;&#x5E76;&#x4E0D;&#x4F1A;&#x7528;&#x5230;&#x8F93;&#x5165;&#x6709;&#x8BEF;&#x65F6;&#x4F1A;&#x629B;&#x51FA;&#x7684;<code>SyntaxError</code>&#xFF08;&#x8BED;&#x6CD5;&#x9519;&#x8BEF;&#xFF09;&#x3002;</p>
<pre><code class="lang-ts"><span class="hljs-keyword">let</span> input = <span class="hljs-string">&quot;...&quot;</span>;
<span class="hljs-keyword">try</span> {
    <span class="hljs-built_in">JSON</span>.parse(input);
}
<span class="hljs-keyword">catch</span> {
    <span class="hljs-comment">// ^ &#x6CE8;&#x610F;&#x6211;&#x4EEC;&#x7684; `catch` &#x8BED;&#x53E5;&#x5E76;&#x6CA1;&#x6709;&#x58F0;&#x660E;&#x4E00;&#x4E2A;&#x53D8;&#x91CF;</span>
    <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&quot;&#x4F20;&#x5165;&#x7684; JSON &#x4E0D;&#x5408;&#x6CD5;\n\n&quot;</span> + input)
}
</code></pre>
<h2 id="checkjsts-check-&#x6A21;&#x5F0F;&#x4E2D;&#x7684;&#x7C7B;&#x578B;&#x65AD;&#x8A00;&#x8F6C;&#x6362;&#x8BED;&#x6CD5;"><code>checkJs</code>/<code>@ts-check</code> &#x6A21;&#x5F0F;&#x4E2D;&#x7684;&#x7C7B;&#x578B;&#x65AD;&#x8A00;/&#x8F6C;&#x6362;&#x8BED;&#x6CD5;</h2>
<p>TypeScript 2.5 &#x5F15;&#x5165;&#x4E86;&#x5728;<a href="https://github.com/Microsoft/TypeScript/issues/5158" target="_blank">&#x4F7F;&#x7528;&#x7EAF; JavaScript &#x7684;&#x9879;&#x76EE;&#x4E2D;&#x65AD;&#x8A00;&#x8868;&#x8FBE;&#x5F0F;&#x7C7B;&#x578B;</a>&#x7684;&#x80FD;&#x529B;&#x3002;&#x5BF9;&#x5E94;&#x7684;&#x8BED;&#x6CD5;&#x662F;<code>/** @type {...} */</code>&#x6807;&#x6CE8;&#x6CE8;&#x91CA;&#x540E;&#x52A0;&#x4E0A;&#x88AB;&#x5706;&#x62EC;&#x53F7;&#x62EC;&#x8D77;&#x6765;&#xFF0C;&#x7C7B;&#x578B;&#x9700;&#x8981;&#x88AB;&#x91CD;&#x65B0;&#x6F14;&#x7B97;&#x7684;&#x8868;&#x8FBE;&#x5F0F;&#x3002;&#x4E3E;&#x4F8B;:</p>
<pre><code class="lang-ts"><span class="hljs-keyword">var</span> x = <span class="hljs-comment">/** @type {SomeType} */</span> (AnyParenthesizedExpression);
</code></pre>
<h2 id="&#x5305;&#x53BB;&#x91CD;&#x548C;&#x91CD;&#x5B9A;&#x5411;">&#x5305;&#x53BB;&#x91CD;&#x548C;&#x91CD;&#x5B9A;&#x5411;</h2>
<p>&#x5728; TypeScript 2.5 &#x4E2D;&#x4F7F;&#x7528;<code>Node</code>&#x6A21;&#x5757;&#x89E3;&#x6790;&#x7B56;&#x7565;&#x8FDB;&#x884C;&#x5BFC;&#x5165;&#x65F6;&#xFF0C;&#x7F16;&#x8BD1;&#x5668;&#x73B0;&#x5728;&#x4F1A;&#x68C0;&#x67E5;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x6765;&#x81EA; &quot;&#x76F8;&#x540C;&quot; &#x7684;&#x5305;&#x3002;&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x6587;&#x4EF6;&#x6240;&#x5728;&#x7684;&#x5305;&#x7684;<code>package.json</code>&#x5305;&#x542B;&#x4E86;&#x4E0E;&#x4E4B;&#x524D;&#x8BFB;&#x53D6;&#x7684;&#x5305;&#x76F8;&#x540C;&#x7684;<code>name</code>&#x548C;<code>version</code>&#xFF0C;&#x90A3;&#x4E48;TypeScript&#x4F1A;&#x5C06;&#x5B83;&#x91CD;&#x5B9A;&#x5411;&#x5230;&#x6700;&#x9876;&#x5C42;&#x7684;&#x5305;&#x3002;&#x8FD9;&#x53EF;&#x4EE5;&#x89E3;&#x51B3;&#x4E24;&#x4E2A;&#x5305;&#x53EF;&#x80FD;&#x4F1A;&#x5305;&#x542B;&#x76F8;&#x540C;&#x7684;&#x7C7B;&#x58F0;&#x660E;&#xFF0C;&#x4F46;&#x56E0;&#x4E3A;&#x5305;&#x542B;<code>private</code>&#x6210;&#x5458;&#x5BFC;&#x81F4;&#x4ED6;&#x4EEC;&#x5728;&#x7ED3;&#x6784;&#x4E0A;&#x4E0D;&#x517C;&#x5BB9;&#x7684;&#x95EE;&#x9898;.</p>
<p>&#x8FD9;&#x4E5F;&#x5E26;&#x6765;&#x4E00;&#x4E2A;&#x989D;&#x5916;&#x7684;&#x597D;&#x5904;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x907F;&#x514D;&#x4ECE;&#x91CD;&#x590D;&#x7684;&#x5305;&#x4E2D;&#x52A0;&#x8F7D;<code>.d.ts</code>&#x6587;&#x4EF6;&#x51CF;&#x5C11;&#x5185;&#x5B58;&#x4F7F;&#x7528;&#x548C;&#x7F16;&#x8BD1;&#x5668;&#x53CA;&#x8BED;&#x8A00;&#x670D;&#x52A1;&#x7684;&#x8FD0;&#x884C;&#x65F6;&#x8BA1;&#x7B97;.</p>
<h2 id="-preservesymlinks&#xFF08;&#x4FDD;&#x7559;&#x7B26;&#x53F7;&#x94FE;&#x63A5;&#xFF09;&#x7F16;&#x8BD1;&#x5668;&#x9009;&#x9879;"><code>--preserveSymlinks</code>&#xFF08;&#x4FDD;&#x7559;&#x7B26;&#x53F7;&#x94FE;&#x63A5;&#xFF09;&#x7F16;&#x8BD1;&#x5668;&#x9009;&#x9879;</h2>
<p>TypeScript 2.5&#x5E26;&#x6765;&#x4E86;<code>preserveSymlinks</code>&#x9009;&#x9879;&#xFF0C;&#x5B83;&#x5BF9;&#x5E94;&#x4E86;<a href="https://nodejs.org/api/cli.html#cli_preserve_symlinks" target="_blank">Node.js &#x4E2D; <code>--preserve-symlinks</code>&#x9009;&#x9879;</a>&#x7684;&#x884C;&#x4E3A;&#x3002;&#x8FD9;&#x4E00;&#x9009;&#x9879;&#x4E5F;&#x4F1A;&#x5E26;&#x6765;&#x548C;Webpack&#x7684;<code>resolve.symlinks</code>&#x9009;&#x9879;&#x76F8;&#x53CD;&#x7684;&#x884C;&#x4E3A;&#xFF08;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x5C06;TypeScript&#x7684;<code>preserveSymlinks</code>&#x9009;&#x9879;&#x8BBE;&#x7F6E;&#x4E3A;<code>true</code>&#x5BF9;&#x5E94;&#x4E86;&#x5C06;Webpack&#x7684;<code>resolve.symlinks</code>&#x9009;&#x9879;&#x8BBE;&#x4E3A;<code>false</code>&#xFF0C;&#x53CD;&#x4E4B;&#x4EA6;&#x7136;&#xFF09;&#x3002;</p>
<p>&#x5728;&#x8FD9;&#x4E00;&#x6A21;&#x5F0F;&#x4E2D;&#xFF0C;&#x5BF9;&#x4E8E;&#x6A21;&#x5757;&#x548C;&#x5305;&#x7684;&#x5F15;&#x7528;&#xFF08;&#x6BD4;&#x5982;<code>import</code>&#x8BED;&#x53E5;&#x548C;<code>/// &lt;reference type=&quot;..&quot; /&gt;</code>&#x6307;&#x4EE4;&#xFF09;&#x90FD;&#x4F1A;&#x4EE5;&#x76F8;&#x5BF9;&#x7B26;&#x53F7;&#x94FE;&#x63A5;&#x6587;&#x4EF6;&#x7684;&#x4F4D;&#x7F6E;&#x88AB;&#x89E3;&#x6790;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x76F8;&#x5BF9;&#x4E8E;&#x7B26;&#x53F7;&#x94FE;&#x63A5;&#x89E3;&#x6790;&#x5230;&#x7684;&#x8DEF;&#x5F84;&#x3002;&#x66F4;&#x5177;&#x4F53;&#x7684;&#x4F8B;&#x5B50;&#xFF0C;&#x53EF;&#x4EE5;&#x53C2;&#x8003;<a href="https://nodejs.org/api/cli.html#cli_preserve_symlinks" target="_blank">Node.js&#x7F51;&#x7AD9;&#x7684;&#x6587;&#x6863;</a>&#x3002;</p>

                                
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